What's new and what's next from Google DeepMind? 🤖

Come and find out with @DynamicWebPaige at FastAPI Conf! 🤓

Join us next week, in Amsterdam, on October 28. 🚲

fastapiconf.com

Optional parameter models in FastAPI 0.159.0 ✨

No dates? No filter.

Send either date? Both are required.

Make the whole Pydantic model optional while keeping its fields required.

Works with query parameters, headers, and cookies. 🚀

fastapi.tiangolo.com/tutorial/query…

Pagination in one model. Filters in another. Both in the same FastAPI endpoint. ✨

FastAPI 0.157.0 lets you combine multiple query parameter models, alongside individual parameters and dependencies.

Works for headers and cookies too. 🚀

fastapi.tiangolo.com/tutorial/query…

Meet the FastAPI Conf master of ceremonies: @judy2k 🎙️

fastapiconf.com/speakers/#mc

We'll have a blast in the FastAPI Conf after party 🕹️🥳

fastapiconf.com/after-party/

Welcome @polar_sh as a Gold Sponsor of FastAPI Conf! 🎉

Polar handles payments, subscriptions, and sales tax so you can focus on building.

Thank you for being part of the inaugural FastAPI Conf! 🤝

Oct 28, Amsterdam

fastapiconf.com/#supported-by

Welcome @Redisinc as a Gold Sponsor of FastAPI Conf! 🎉

Redis helps developers build fast applications with caching and real-time data.

Thank you for being part of the inaugural FastAPI Conf! 🤓

Oct 28, Amsterdam

fastapiconf.com/#supported-by

Our first Gold Sponsor for FastAPI Conf is @runpod! 🎉

Runpod provides cloud GPUs for training and deploying AI models.

Thank you for being part of the inaugural FastAPI Conference! 🙌

Oct 28, Amsterdam

fastapiconf.com/#supported-by

FastAPI now has built-in OpenTelemetry support, natively 📈

No extra code needed.

See how your app behaves in production.

Go and upgrade to "fastapi[standard]" version 0.142.2 ⬆️

Read the docs: fastapi.tiangolo.com/advanced/opent…

Building AI agents with FastAPI? 🤖

Come and learn from @cailliaup of @Redisinc at FastAPI Conf: streaming LLM responses, shared state, caching, and keeping work running after a client disconnects. 🤓

fastapiconf.com/speakers/#piet…

Talk update 🎙️

@fvoron is bringing a new topic to FastAPI Conf 2026:

You don’t need /v2: API Versioning with FastAPI

Come and learn the latest tricks from @polar_sh, including a custom SDK for clients, based on the new FastAPI versioning system 🤖

fastapiconf.com/speakers/#fran…

Want to learn tips and tricks for building FastAPI apps with AI, directly from @jxnlco on the Codex team at OpenAI? 🤓

Join us at FastAPI Conf in Amsterdam! 🚲

Psst, Sep 20 is the deadline to select your T-shirt size. 👕

fastapiconf.com/speakers/#jaso…

What makes FastAPI fast, and how much faster can it get? ⚡

Come and learn from @marcelotryle , maintainer of Starlette and Uvicorn: surprising bottlenecks, Rust and Zig experiments, and what's next. 🤓

Join us at FastAPI Conf!

fastapiconf.com/speakers/#marc…

How does FastAPI help deliver NASA's James Webb Space Telescope data around the world? 🔭

Come and learn from @benjamin_falk at FastAPI Conf: FastAPI and the tech stack used at the Space Telescope Science Institute. 🌠

fastapiconf.com/speakers/#ben-…

Pydantic is the data building block of FastAPI. 🏯

In these past years, it became the data building block of AI... and virtually all Python data validation. 🐍

Come and learn directly from @samuelcolvin, the author of @pydantic, how he uses AI to code.

fastapiconf.com/speakers/#samu…

Come and learn how typing.Annotated works underneath from @fvoron at FastAPI Conf. 🤓

Learn things you won't learn anywhere else.

Join us in Amsterdam! 🚲️

fastapiconf.com/speakers/#fran…

The FastAPI full-stack template now comes with @FastAPIcloud ✨

Create your account, set settings, done. It deploys on merge. ⚡️

You can also still self-host it instead, using the guide and following all the steps.

github.com/fastapi/full-s…

At some point recently FastAPI passed 100k followers on LinkedIn 💯

Thank you! 🙌

linkedin.com/company/fastap…

There's also:

X: x.com/fastapi
Bluesky: bsky.app/profile/fastap…

FastAPI Conf speaker! 📢

@DynamicWebPaige is constantly making sure Google DeepMind AI tools are great for developers. Used to do that at GitHub, TensorFlow, and more. 🤓

Amazing speakers. FastAPI maintainers. An incredible community. Lots of Python.

fastapiconf.com

The full-stack FastAPI template now serves the React - TanStack frontend with FastAPI ✨

One single app, one single deployment, one single domain. No CORS fights and debugging.

github.com/fastapi/full-s…

The FastAPI Full Stack Template now uses React Email for email templates and Mailpit for local email testing! 📬️

Develop emails with React Email, test them locally with Mailpit, generate and commit the templates, and use them from FastAPI as always. ⚡️

github.com/fastapi/full-s…

FastAPI Conf speaker news! 📢

@jxnlco, creator of Instructor, the person that convinced AI Labs to provide structured output with Pydantic (automatic compatibility with FastAPI).

He's bringing us some insights directly from the Codex team at @OpenAI 🤖

fastapiconf.com

FastAPI Conf news! 📢

@marcelotryle, maintainer of Starlette and Uvicorn, the web components behind FastAPI, will join us as a speaker in Amsterdam! 🙌

Get your tickets: fastapiconf.com

Here's the full-stack-fastapi-template 0.12.0 🎁

More modern, simpler, easier.

Too many improvements to fit here, but let's start:

You can now simply click the "Use this template" button in GitHub to create a new repo, possibly private. ✨

github.com/fastapi/full-s…

FastAPI Conf speaker news! 📢

@benjamin_falk, FastAPI Expert, has led projects to distribute space science data around the world.

James Webb, The Roman Telescope launched next month, and more. 🔭

Come to see real world advanced FastAPI use cases! 🌠

fastapiconf.com

New FastAPI Conf speaker! 📢

@samuelcolvin, creator and founder of @pydantic ✨

FastAPI is built on top of Pydantic and the two ecosystems are a perfect match. Of course we had to have him! 🤝

Early bird ending soon, got your tickets? fastapiconf.com

FastAPI Conf first speaker announcement! 📢

@fvoron, a long time FastAPI community member and open source builder, now helping developers sell software products through his work at @polar_sh 🏦

Welcome to Amsterdam, François!

Stay tuned, because this is just the beginning 🔥

FastAPI app.frontend() now supports local development 💻️

fastapi dev: a missing frontend directory only shows a warning 👨‍🔬

fastapi run: exits with an error instead 🚨

✨ new default check_dir="auto"
✨ new env var FASTAPI_ENV="development"

fastapi.tiangolo.com/tutorial/front…

FastAPI now has 100k GitHub stars ✨

100k thank yous! 🙌 🍰

github.com/fastapi/fastapi

FastAPI's router.frontend() now also supports router dependencies ✨

E.g. add cookie auth to a router, and a frontend at /admin.

Handle the cookie auth in FastAPI, and let the frontend do its client-side routing (e.g. TanStack Router with React).

In FastAPI 0.139.0 🔖

Teach your agent to use it with the embedded skill in FastAPI 🤖

FastAPI can now serve your frontend app ✨

With support for client-side routing 😎

Great for React with TanStack Router, Astro static builds, Vite-based apps, etc. 🎉

FastAPI version 0.138.0 🔖

fastapi.tiangolo.com/tutorial/front…

Can you imagine being there? 🤩

Surrounded by FastAPI developers and maintainers from around the world.

Watching the best FastAPI talks you could ask for 😎

FastAPI Conf will happen at Westergas, in Amsterdam 🌷

Join the waiting list 🎟️

fastapiconf.com

Have you found the easter egg in the FastAPI Conf website? 🥚

What's your highest score? 🕹️

fastapiconf.com

Big news: the first-ever ✨ FastAPI Conf ✨ is coming!

📍 Amsterdam
📅 October 28

Meet the FastAPI team, connect with developers ☕️

🎟️ Join the waitlist for early ticket access: fastapiconf.com

Now there's autocompletion and docs in pyproject.toml for FastAPI 🎉

[tool.fastapi]
entrypoint = "main:app"

Make sure you have a modern editor and TOML plugin, like @code with @tombi_toml 🤓

The FastAPI VS Code extension just shipped "go to tests" ✨

Thanks Savannah! 🙌

Here's FastAPI 0.135.3, adding support for fully vibe-coded apps ✨

Use the new app.vibe() decorator, embrace the AI future 🤖

Read the new docs: fastapi.tiangolo.com/advanced/vibe/

Sneak peek, that's it: response_class and yield ⚡️

Big features in FastAPI 0.134.0 ✨

🌊 Stream JSON Lines with yield: fastapi.tiangolo.com/tutorial/strea…

🦀 @pydantic serializes each item to JSON (on Rust) for max perf

📦️Stream binary data with yield: fastapi.tiangolo.com/advanced/strea…

🤖 Library Agent Skill updated with this

🥚 Easter egg

Increase your FastAPI JSON response performance by 2x or more 🚄

1. Upgrade to the just released FastAPI 0.131.0 🎁
2. Declare your response model - return type ✨

With that, now @pydantic handles the JSON serialization on the Rust side 🦀

fastapi.tiangolo.com/advanced/custo…

LLMs and other tools are great, use them wisely 🧙

fastapi.tiangolo.com/contributing/#…

The full-stack-fastapi-template now uses @shadcn / ui (with @tailwindcss) for the frontend 🚀🎉

There's still dark mode too, and all the nice things 🦇

Thanks @alejsdev ! 🙌

github.com/fastapi/full-s…

FastAPI 0.124.0 comes with better server error tracebacks. ✨

Before, if the app sent invalid data back, the server error logs would not show where the problem was. 😔

Now it shows the (clickable) file, line, function, and path operation. 📢

Thanks @savostrowski! 🙌

The FastAPI CLI now supports declaring the entrypoint (your app location) in pyproject.toml ✨

Configure there once, and then you can just run:

$ fastapi dev

...without having to pass a file path 😎

Thanks @patrick91! 🙌

Here's FastAPI 0.119.0 🚀

With support for both @pydantic v2 and v1 on the same app, at the same time 🤯

This is just so you can migrate to Pydantic v2 if you haven't done it yet, here's your (last) chance! 🤓

Pydantic v1 is now deprecated ⛔️

Read more fastapi.tiangolo.com/how-to/migrate…

Now you can use the entrypoint syntax with the FastAPI CLI 🚀

(fastapi-cli version 0.0.11)

Thanks @patrick91! 🙌

FastAPI is now officially the most used web framework by Python developers 😁🚀🎉

From the Python Developer Survey 🐍

"The +5 point increase for FastAPI is one of the most significant shifts in the web framework space."

"This signals a strong trend towards using Python for building performant APIs and reflects the overall strength of the Python ecosystem."

🤯🐍🚀

survey.stackoverflow.co/2025/technolog…

The cake was not a lie.

FastAPI now has 84k GitHub stars ✨

FastAPI is now the most starred backend framework 🎉

...not only in Python, in all programming languages 🤯

Thanks to all who inspired it and paved the way 🙌

And thank you for adopting it! 🍰☕️

github.com/fastapi/fastapi

FastAPI has been downloaded 1 billion times. 😮🥳🎉

1,000,000,000 downloads.

That's a lot! 😁🚀

github.com/fastapi/fastapi

You can check it in pepy.tech/projects/fasta…

The command fastapi (the FastAPI CLI) now looks so much nicer 😎

It now uses @patrick91's rich-toolkit 🎨

To get it, upgrade your dependencies with fastapi[standard] 🤓

Or manually upgrade the package fastapi-cli to the latest version: 0.0.6 🚀

Use @pydantic models to forbid extra values in Query, Cookie, or Header parameters in @FastAPI ⛔️

fastapi.tiangolo.com/tutorial/query…

Use @pydantic models to declare Cookie fields in @FastAPI 🍪

fastapi.tiangolo.com/tutorial/cooki…

Use @pydantic models to declare Header fields in @FastAPI ✉️

fastapi.tiangolo.com/tutorial/heade…

BOOM! 💥 Here it is! 🎉

FastAPI 0.115.0 🚀

One (actually several) of the most awaited features in @FastAPI 🎁

Use @pydantic models for Query parameters ✨

fastapi.tiangolo.com/tutorial/query…

Plus more 👇️

Something extra to start your weekend, FastAPI 0.114.0 🎁

You can now forbid extra form fields with @pydantic models 😎

fastapi.tiangolo.com/tutorial/reque…

Are you ready for a big release? 🤩

Here's 0.113.0, with a long-awaited feature ✨

Declare form fields with @pydantic models 🚀

fastapi.tiangolo.com/tutorial/reque…

Look at the shiny new docs teaching you what you need to know about virtual environments in Python ✨📝

fastapi.tiangolo.com/virtual-enviro…

FastAPI now has 74k GitHub stars ✨

A little bit more than Spring Boot (Java) 😎🚀

star-history.com/#fastapi/fasta…

Here's the new FastAPI CLI! ✨🎉

Upgrade to FastAPI version 0.111.0 (just released) and you'll have it in your terminal. 😎

fastapi.tiangolo.com/fastapi-cli/

Look, a new FastAPI logo 😎✨

Happy Holidays! Here's FastAPI 0.106.0 🎁🎄

Now you can raise HTTPException in dependencies after yield. ✨

The exit code also runs before the response is sent, better performance and resource usage. 🚀

Don't use them in background tasks, though.

fastapi.tiangolo.com/tutorial/depen…

Here it is: the FastAPI Reference - Code API in the docs. ✨

One of the most awaited requests from many users. 🔥

FastAPI 0.104.0 🔖

fastapi.tiangolo.com/reference/fast…

Thanks to the @getsentry team behind this, organizing it all! @steven_boKnows, @elain 🎉

And thank you all for being there! We even had people from several countries coming just for this event, it was indeed a wonderful evening. 🤗

Now, let's continue building stuff! 🚀

To finalize, we had a fireside chat between @mitsuhiko and @tiangolo, answering questions from the audience, with @zeeg, the founder of @getsentry, moderating and stirring (things 🤪) up (the conversation).

And for the last ones we brought @samuelcolvin and @marcelotryle too 🎙️

Continuing with mixing Rust and Python, @samuelcolvin, the creator of @pydantic, showed us the tricks underneath the new Pydantic v2, how the core was written in Rust, and how we can keep the same Python code, but get 2000% more performance (20X) just by upgrading. 🚄😎

Then we had @mitsuhiko, the creator of Flask, explaining how straightforward it is to mix Rust and Python, how it's a great combination of tools and ecosystems, and how it allows us to get the extra performance/benefits from Rust while staying in the convenience of Python. 🦀🐍

Next, we had @marcelotryle, the current maintainer of Uvicorn, co-maintainer of Starlette, and top FastAPI Expert. 😎

He showed us the history of @FastAPI 📜, including several mentions honoring @starletdreaming (creator of Starlette, Uvicorn, DRF, etc.). ✨

We started with an express intro to @FastAPI, the current state, who's using it, recent features, and future plans, by @tiangolo, the creator of FastAPI. 🚀

(The same person writing all this. 🤪)

Thank you all for coming to Berlin for the @FastAPI event, brought to you by @getsentry 🚀

FastAPI 0.103.0 🚀

Support for openapi_examples, so you can keep using @pydantic v2 and still make Swagger UI show examples in the docs. 🤓

fastapi.tiangolo.com/tutorial/schem…

First-ever FastAPI event, in Berlin! 🎉

Hear from (and mingle with):

@tiangolo - creator of FastAPI 🚀
@mitsuhiko - creator of Flask 🍾
@samuelcolvin - creator of Pydantic 📐
@marcelotryle - maintainer of Uvicorn, Starlette 🚄

Thanks to @getsentry 🎁

sentry.io/resources/fast…

IT'S HERE! 🍾🎉

FastAPI 0.100.0, final release 🚀

Official support for @pydantic v2 😎

Still supporting Pydantic v1 🤓

Is there a better way to celebrate 60k GitHub stars? ✨

Check out the release notes: fastapi.tiangolo.com/release-notes/…

Hello 20K cool people! 😎👋